| Van Dyke | John | casing for speech input apparatus | 112747 | Cedar Rapids | 1938 |
| Houghton | George | fuel feeding means | 2136688 | Cedar Rapids | 1938 |
| Austin | Ellsworth | snow moving device | 2137321 | Cedar Rapids | 1938 |
| Austin | Ellsworth | earth moving device | 2137829 | Cedar Rapids | 1938 |
| Myers | Ola | multiple row planter | 2138011 | Central City | 1938 |
| Dunn | Allen | grinding device | 2139887 | Cedar Rapids | 1938 |
| Brownlee | Harold | producing furfural | 2140572 | Cedar Rapids | 1938 |
| Rodler | Waldo | earth moving device | 2108304 | Cedar Rapids | 1938 |
| Choate | Roy | earth moving device | 2108304 | Cedar Rapids | 1938 |
| Leech | William | earth moving device | 2108304 | Cedar Rapids | 1938 |
| Kubias | Lillian | portable air cooling device | 2111070 | Cedar Rapids | 1938 |
| Long | Angus | cleaning device | 2113452 | Cedar Rapids | 1938 |
| Hulshizer | Bessie | carpet rag strip splicer | 2115856 | Cedar Rapids | 1938 |
| Geesaman | Alvin | bag holder | 2116784 | Cedar Rapids | 1938 |
| Austin | Ellsworth | propeller | 2116818 | Cedar Rapids | 1938 |
| Austin | Ellsworth | earth moving device | 2121240 | Cedar Rapids | 1938 |
| Kesler | Carl | starch | 2121502 | Cedar Rapids | 1938 |
| Herbeck | Charles | air preheater | 2122176 | Cedar Rapids | 1938 |
| Powell | Virgil | identification device for motor vehicles and operators | 2123800 | Cedar Rapids | 1938 |
| Austin | Ellsworth | snow moving device | 2123925 | Cedar Rapids | 1938 |
| Lattner | Emert | hydraulic system control means | 2123950 | Cedar Rapids | 1938 |
| Kesler | Carl | starch | 2124372 | Cedar Rapids | 1938 |
| Harman | Harry | lateral mowing apparatus | 2165851 | Lisbon | 1939 |
| Freeman | Joseph | brake testing device | 2166244 | Cedar Rapids | 1939 |
| Austin | Ellsworth | propeller | 2166653 | Cedar Rapids | 1939 |
| Vondracek | Frank | mower | 2167130 | Cedar Rapids | 1939 |
| Collins | Arthur | automatic tuning system and apparatus | 2168326 | Cedar Rapids | 1939 |
| Musgrave | Claude | automobile lift platform | 2168624 | Cedar Rapids | 1939 |
| Byrne | John | telescoping vertical radiator and erecting the same | 2173095 | Cedar Rapids | 1939 |
| Craft | Liva | oscillation system | 2142999 | Cedar Rapids | 1939 |
| Collins | Arthur | automatic tuning apparatus | 2174552 | Cedar Rapids | 1939 |
| Bessemer | Lester | dynatron oscillation system | 2175174 | Cedar Rapids | 1939 |
| Samuelson | Robert | control circuit for shaft positioning system | 2145895 | Cedar Rapids | 1939 |
| Foster | Everette | piezoelectric cell | 2177629 | Cedar Rapids | 1939 |
| Doetzel | Fred | drafting instrument | 2147017 | Cedar Rapids | 1939 |
| Stein | Doris | carton | 2178730 | Cedar Rapids | 1939 |
| Tokheim | John | automobile drain float | 2148330 | Cedar Rapids | 1939 |
| Austin | Ellsworth | earth moving device | 2180658 | Cedar Rapids | 1939 |
| Box | Harry | fastener | 2149665 | Cedar Rapids | 1939 |
| Austin | Ellsworth | wagon | 2149949 | Cedar Rapids | 1939 |
| Lattner | Emert | pump | 2149969 | Cedar Rapids | 1939 |
| Collins | Arthur | control circuit for signal transmitting and receiving apparatus | 2150362 | Cedar Rapids | 1939 |
| Craft | Liva | distortion reducing system for grid modulated amplifier | 2182790 | Cedar Rapids | 1939 |
| Blunt | Grover | cream cooler | 2150751 | Cedar Rapids | 1939 |
| Kilberger | Frank | threshing machine | 2150976 | Cedar Rapids | 1939 |
| White | Clifford | pencil pointer | 2152395 | Cedar Rapids | 1939 |
| Tokheim | John | safety device for volatile liquid storage tanks | 2152422 | Cedar Rapids | 1939 |
| Craft | Liva | amplifier circuit | 2155404 | Cedar Rapids | 1939 |
| Maricle | Walter | ice breaking and rotary scarifier device | 2197549 | Cedar Rapids | 1940 |
| Hargrave | Fred | ice breaking and rotary scarifier device | 2197549 | Cedar Rapids | 1940 |
| Austin | Ellsworth | earth moving device | 2198147 | Cedar Rapids | 1940 |
| Solbrig | Gustav | valve and seat redressing tool | 2198925 | Cedar Rapids | 1940 |
| Boileau | Arthur | design for a liquid pasteurizer | 123469 | Cedar Rapids | 1940 |
| Hauser | Ernest | heating system | 2201312 | Cedar Rapids | 1940 |
| Kriekard | Edward | target game | 2201865 | Cedar Rapids | 1940 |
| Austin | Ellsworth | earth mover | 2203713 | Cedar Rapids | 1940 |
| Austin | Ellsworth | earth mover | 2204033 | Cedar Rapids | 1940 |
| Balcar | Otto | rail joint | 2204395 | Cedar Rapids | 1940 |
| Byrne | John | voltage regulation system for vacuum tube amplifiers | 2204571 | Cedar Rapids | 1940 |
| Davis | Frank | transmission control system | 2204578 | Cedar Rapids | 1940 |
| Davis | Frank | limiting amplifier control means | 2204726 | Cedar Rapids | 1940 |
| Chamberlin | Earl | valve for hydraulic control systems | 2204885 | Cedar Rapids | 1940 |
| Reid | Raymond | sanding machine | 2205492 | Cedar Rapids | 1940 |
| Davis | Frank | electrical control apparatus | 2206882 | Cedar Rapids | 1940 |
| Broz | William | fishhook | 2208069 | Prairieburg | 1940 |
| Wirkler | Walter | split side band amplifier circuit | 2210968 | Cedar Rapids | 1940 |
| Wirkler | Walter | single side band amplifier circuit | 2211040 | Cedar Rapids | 1940 |
| Baker | Walter | saddle block structure for excavators | 2211194 | Cedar Rapids | 1940 |
| Turner | David | flower carrier | 2212089 | Cedar Rapids | 1940 |
| Sayers | Reuel | bunsen burner | 2214284 | Cedar Rapids | 1940 |
| Lattner | Emert | boiler | 2214676 | Cedar Rapids | 1940 |
| Austin | Ellsworth | earth mover | 2215025 | Cedar Rapids | 1940 |
| Austin | Ellsworth | earth moving device | 2215026 | Cedar Rapids | 1940 |
| Conway | Robert | pulverizer | 2185331 | Cedar Rapids | 1940 |
| Carter | Charles | game apparatus | 2215687 | Cedar Rapids | 1940 |
| Cass | Frank | toy pistol | 2215721 | Cedar Rapids | 1940 |
| Ronk | George | combination railway and highway car | 2215886 | Cedar Rapids | 1940 |
| Korensky | Edward | dipper stick for power shovels or the like | 2216070 | Cedar Rapids | 1940 |
| Schaefer | Curt | filtering machine | 2185868 | Cedar Rapids | 1940 |
| Whetstine | Jesse | draft control means | 2186354 | Cedar Rapids | 1940 |
| Collins | Arthur | distortion reducing system for suppressed carrier transmission | 2186958 | Cedar Rapids | 1940 |
| Hageman | Ralph | burner | 2227901 | Cedar Rapids | 1941 |
| Solbrig | Gustav | cylinder ridge grinder | 2229314 | Cedar Rapids | 1941 |
| Crow | Luther | excavating shovel | 2258478 | Cedar Rapids | 1941 |
| Baker | Walter | excavating shovel | 2258478 | Cedar Rapids | 1941 |
| Lehti | David | excavating shovel | 2258478 | Cedar Rapids | 1941 |
| English | John | electric switch | 2260564 | Cedar Rapids | 1941 |
| Myers | Ola | marking device | 2232074 | Central City | 1941 |
| Martin | George | husking rolls | 2261069 | Fairfax | 1941 |
| Demory | Harry | fish lure or trolling hook | 2261433 | Cedar Rapids | 1941 |
| Warren | Merb | explosion apparatus and method for cereal grains and the like | 2261456 | Cedar Rapids | 1941 |
| Birky | William | wheel lift | 2262486 | Cedar Rapids | 1941 |
| Skinner | Howard | dishwashing machine | 2262517 | Cedar Rapids | 1941 |
| Baker | Walter | excavating shovel | 2264231 | Cedar Rapids | 1941 |
| Lehti | David | excavating shovel | 2264231 | Cedar Rapids | 1941 |
| Wolrab | Milo | tractor | 2264924 | Mount Vernon | 1941 |
| Ekbom | Hilmer | traction control means | 2266179 | Cedar Rapids | 1941 |
| Korensky | Edward | traction control means | 2266179 | Cedar Rapids | 1941 |
| Tokheim | John | liquid level gauge equipment | 2237461 | Cedar Rapids | 1941 |
| Tokheim | John | liquid level gauge equipment | 2237462 | Cedar Rapids | 1941 |
| Lyman | Glenn | multiple march folio | 2238332 | Cedar Rapids | 1941 |
| Austin | Ellsworth | oil filter | 2242807 | Cedar Rapids | 1941 |
| Austin | Ellsworth | earth tamper | 2242808 | Cedar Rapids | 1941 |
| Dunn | Allen | means and method for machining parts | 2243946 | Cedar Rapids | 1941 |
| Maloy | Ernest | display sign | 128603 | Cedar Rapids | 1941 |
| Coleman | Vance | combined conveyer and mixer for stock feeds, flours, and the like | 132373 | Cedar Rapids | 1942 |
| Kirk | Howard | variable fluid braking means | 2306481 | Otter Creek Township, Linn County | 1942 |
| Reysa | Lester | illuminated fluid testing means | 2291562 | Cedar Rapids | 1942 |
| Pitts | Robert | illuminated fluid testing means | 2291562 | Cedar Rapids | 1942 |
| Corey | Flournoy | illuminated fluid testing means | 2291562 | Cedar Rapids | 1942 |
| Chandler | William | crank case ventilator | 2291879 | Cedar Rapids | 1942 |
| Anderson | Oliver | monument | 133690 | Cedar Rapids | 1942 |
| English | John | ignition and control means for fuel burners | 2296025 | Cedar Rapids | 1942 |
| Pollitz | Harold | portable mixing plant | 2298160 | Cedar Rapids | 1942 |
| Austin | Ellsworth | snow plow | 2299451 | Cedar Rapids | 1942 |
| Spaight | Harold | constructing buildings | 2300181 | Cedar Rapids | 1942 |
| Pieracci | Roger | frequency modulation distortion correction system | 2301907 | Cedar Rapids | 1942 |
| Pieracci | Roger | frequency modulation monitoring | 2269126 | Cedar Rapids | 1942 |
| Ronk | George | highway or transport trailer | 2303501 | Cedar Rapids | 1942 |
| Clark | James | combustion air supply system | 2271733 | Cedar Rapids | 1942 |
| Hodgdon | Newel | pasteurizing device | 2271862 | Cedar Rapids | 1942 |
| Austin | Ellsworth | excavator | 2272540 | Cedar Rapids | 1942 |
| Austin | Ellsworth | earth mover | 2273010 | Cedar Rapids | 1942 |
| Chamberlin | Earl | venetian blind cleaning machine | 2273514 | Cedar Rapids | 1942 |
| Pollitz | Harold | crusher | 2273772 | Cedar Rapids | 1942 |
| Austin | Ellsworth | push pole structure | 2274183 | Cedar Rapids | 1942 |
| Rockwell | Harvey | earth mover | 2275601 | Cedar Rapids | 1942 |
| Austin | Ellsworth | earth mover | 2275601 | Cedar Rapids | 1942 |
| English | John | thermostatic control means | 2308272 | Cedar Rapids | 1943 |
| Ronk | George | transport trailer | 2334037 | Cedar Rapids | 1943 |
| Austin | Ellsworth | implement support for vehicles | 2334374 | Cedar Rapids | 1943 |
| Voggenthaler | Albert | apparatus for freezing ice cream | 2309424 | Cedar Rapids | 1943 |
| Newbold | Park | corn planter | 2310540 | Cedar Rapids | 1943 |
| Newbold | Park | fire escape | 2310705 | Cedar Rapids | 1943 |
| Lehti | David | combination crawler and rail vehicle | 2311304 | Cedar Rapids | 1943 |
| Crow | Luther | combination crawler and rail vehicle | 2311304 | Cedar Rapids | 1943 |
| Corey | Flournoy | apparatus for graining | 2337453 | Cedar Rapids | 1943 |
| Doetzel | Fred | apparatus for graining | 2337453 | Cedar Rapids | 1943 |
| Pitts | Robert | apparatus for graining | 2337453 | Cedar Rapids | 1943 |
| Pollitz | Harold | vibrating screen | 2312477 | Cedar Rapids | 1943 |
| Byrne | John | broadcasting system | 2313048 | Cedar Rapids | 1943 |
| Corey | Flournoy | design for a poultry picking machine | 135668 | Cedar Rapids | 1943 |
| Francois | Carl | expansion joint | 2317598 | Cedar Rapids | 1943 |
| Gaddis | Roy | material distributing device | 2317853 | Cedar Rapids | 1943 |
| Tubbs | Ira | valve | 2318115 | Mount Vernon | 1943 |
| Vondracek | Frank | lawn mower | 2319483 | Cedar Rapids | 1943 |
| Austin | Ellsworth | earth mover | 2319486 | Cedar Rapids | 1943 |
| Balcar | John | clamping means | 2322107 | Cedar Rapids | 1943 |
| Mollenhauer | Paul | handle for milk cans | 2322871 | Alburnett | 1943 |
| Austin | Ellsworth | tractor attachment | 2341853 | Cedar Rapids | 1944 |
| Austin | Ellsworth | implement for tractors | 2344584 | Cedar Rapids | 1944 |
| Austin | Ellsworth | excavator | 2347882 | Cedar Rapids | 1944 |
| Choate | Roy | excavator | 2347882 | Cedar Rapids | 1944 |
| Olson | Roy | tap switch | 2348222 | Marion | 1944 |
| Ekbom | Hilmer | retractable mast | 2348285 | Cedar Rapids | 1944 |
| English | John | ignition means for fluid fuel burners | 2351325 | Cedar Rapids | 1944 |
| Kohl | Otto | preventing the spread of disease | 2351686 | Cedar Rapids | 1944 |
| Austin | Ellsworth | bulldozer | 2351799 | Cedar Rapids | 1944 |
| Pollitz | Harold | crusher | 2352970 | Cedar Rapids | 1944 |
| Austin | Ellsworth | earth mover | 2353120 | Cedar Rapids | 1944 |
| Daniels | Arthur | dipper tooth | 2369285 | Cedar Rapids | 1945 |
| Nissen | George | tumbling device | 2370990 | Cedar Rapids | 1945 |
| Wulfsberg | Paul | volume limiter circuit | 2372243 | Cedar Rapids | 1945 |
| Reysa | Lester | mop swab for use on smooth surfaced floorings and the like | 2374170 | Cedar Rapids | 1945 |
| May | Richard | locking bar stop means | 2378941 | Cedar Rapids | 1945 |
| Lewis | George | steering by driving | 2379628 | Cedar Rapids | 1945 |
| Austin | Ellsworth | excavator | 2380285 | Cedar Rapids | 1945 |
| Rockwell | Harvey | hoist control unit | 143029 | Cedar Rapids | 1945 |
| Mollenhauer | Herman | automatic area control propeller | 2380540 | Toddville | 1945 |
| Rockwell | Harvey | combined jack and bracket mounting | 143168 | Cedar Rapids | 1945 |
| Deal | Troy | stabilizer | 2381425 | Cedar Rapids | 1945 |
| Baker | Walter | stabilizer | 2381425 | Cedar Rapids | 1945 |
| Rockwell | Harvey | design for a bulldozer | 143353 | Cedar Rapids | 1945 |
| Oberweiser | Gilbert | zero phase shift selective amplifier | 2383984 | Cedar Rapids | 1945 |
| May | Richard | automatic tuning apparatus | 2391470 | Cedar Rapids | 1945 |
| Johnson | Warren | carton closing device | 2391708 | Cedar Rapids | 1945 |
| Newbold | Park | hog trap | 2408872 | Cedar Rapids | 1946 |
| Choate | Roy | vehicle | 2406944 | Cedar Rapids | 1946 |
| Austin | Ellsworth | vehicle | 2406944 | Cedar Rapids | 1946 |
| Collins | Arthur | tuning device clutch | 2409192 | Cedar Rapids | 1946 |
| Saxon | Warren | tractor | 2411061 | Cedar Rapids | 1946 |
| Wirkler | Walter | azimuth radio direction finding system | 2408118 | Cedar Rapids | 1946 |
| Wirkler | Walter | heterodyne radio direction finding system | 2408119 | Cedar Rapids | 1946 |
| Olson | Roy | frequency multiplier | 2411166 | Marion | 1946 |
| Wirkler | Walter | radio direction finding system | 2408120 | Cedar Rapids | 1946 |
| Wirkler | Walter | direction finding system with frequency shift | 2408121 | Cedar Rapids | 1946 |
| Wirkler | Walter | heterodyne direction finder with single receiver | 2408122 | Cedar Rapids | 1946 |
| Baumgardner | Earl | electric switch | 2413135 | Marion | 1946 |
| Rockwell | Harvey | design for a hydraulic pump and control unit | 143547 | Cedar Rapids | 1946 |
| McFadden | William | electric dilator | 143924 | Cedar Rapids | 1946 |
| Fleming | William | tenderizing implement | 2392036 | Cedar Rapids | 1946 |
| Reinschmidt | Edward | tube locking device | 2392410 | Cedar Rapids | 1946 |
| Ronk | George | transport trailer | 2415706 | Cedar Rapids | 1947 |
| Austin | Ellsworth | vehicle for exploding land mines and for tamping ground | 2419308 | Cedar Rapids | 1947 |
| Daniels | Arthur | excavating tooth | 2419677 | Cedar Rapids | 1947 |
| Boileau | Arthur | resilient churn support | 2419814 | Cedar Rapids | 1947 |
| Austin | Ellsworth | earth working implement | 2420027 | Cedar Rapids | 1947 |
| Beetham | Robert | inductive tuning | 2423824 | Cedar Rapids | 1947 |
| May | Richard | keying relay | 2423838 | Cedar Rapids | 1947 |
| Johnson | Warren | container sealing apparatus | 2425062 | Cedar Rapids | 1947 |
| Fleming | William | device for sharpening cutlery | 2425369 | Cedar Rapids | 1947 |
| Vernon | James | turbine | 2425904 | Marion | 1947 |
| Austin | Ellsworth | push plate mounting for earth movers | 2426426 | Cedar Rapids | 1947 |
| Kesler | Carl | cereal starch adhesive | 2427562 | Cedar Rapids | 1947 |
| Rankin | David | cereal starch adhesive | 2427562 | Cedar Rapids | 1947 |
| Austin | Ellsworth | articulated push frame for earth movers | 2429506 | Cedar Rapids | 1947 |
| Rockwell | Harvey | fairlead construction | 2430618 | Cedar Rapids | 1947 |
| Hyler | Loiell | adapter for earth moving apparatus | 2430770 | Cedar Rapids | 1947 |
| Kinsley | Jason | dental articulator | 2432624 | Cedar Rapids | 1947 |
| Engberg | Frederick | pipe cleaner | 2433105 | Cedar Rapids | 1947 |
